Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0af98a3edab0095…

MALICIOUS

PDF

84.0 KB Created: 2021-06-07 06:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 608df32995c32814ec98ce6ec5ae4644 SHA-1: 46cedcc4cf6aecde9c55451a777b7fceccfcc5d1 SHA-256: e0af98a3edab009523b2a0454eed2d686ba06d949d426753349c882f2fbb873a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://catamma.ru/pbw?utm_term=how+to+trim+a+euonymus+bush PDF link annotation
    • https://xitipirobopu.weebly.com/uploads/1/3/0/8/130813988/fokerefuvev_taniva_kubamifepetiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_602b862daf710.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422628/normal_5fcaba987959a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383138/normal_5ffe63dc7ebcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483097/normal_604505bdeb970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415534/normal_5fe66f34ac23e.pdfIn PDF document text
    • https://zedodunojoponex.weebly.com/uploads/1/3/6/0/136083391/gizifasunowigumof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426967/normal_605d70d428b98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469106/normal_5ff393327367b.pdfIn PDF document text
    • https://mufobaxepomek.weebly.com/uploads/1/3/4/8/134866816/6998623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_60bbc7046e896.pdfIn PDF document text
    • https://zedazepofa.weebly.com/uploads/1/3/0/9/130969939/zaturuwokixone-sovovolerowe-vinakodivetuno-pekitexovaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_602e255510529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_605600757a41e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463002/normal_605a3a56e3c33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_601304f1d691e.pdfIn PDF document text
    • https://pagiwidew.weebly.com/uploads/1/3/4/4/134498508/defizuxuz_jafiguxivuxud_jisomotesomumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_6063771ca5557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_60324d20ae2da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5fe8064203116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/84be9c75-3c88-4335-8cf4-191cfdf9cc45/vexoduvepoduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ffd778b-c1cc-4cba-8041-e325ba769057/schlage_fe595_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e3c261-84c7-4856-b582-9f5c20d481d4/bedoviruwiwagaje.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 5188 bytes
SHA-256: e0d963564ba6659f22865c232567c26588b9ce6311d45960ec3e2bf2f6df41d2
font_01_sfnt_off0000ff2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2B 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000107b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B8 10632 bytes
SHA-256: 4b4c0d8252286d13fd104b28993bdba95273d2c67961a039af510a358179a7cb
font_03_sfnt_off00012c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C44 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15